docs: update changelog. #3756

Job	Run time
smoke (amaranth-lang/amaranth-stdio)	47s
smoke (amaranth-lang/amaranth-boards)	39s
test (3.8)	2m 51s
smoke (amaranth-lang/amaranth-soc)	40s
document	51s
check-links	1m 50s
test (pypy-3.11)	5m 51s
test (3.10)	2m 40s
test (pypy-3.8)	6m 8s
test (pypy-3.10)	6m 24s
test (3.13-dev)	3m 1s
test (pypy-3.9)	5m 31s
test (3.12)	3m 37s
test (3.9)	2m 37s
test (3.11)	2m 50s
publish-docs	14s
publish-docs-dev	-1s
required	3s
publish-package	23s
publish-schemas	9s
publish-release	3s
	47m 8s

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